For advice on working methods, this is the page you need.

To work on the quality of your written English, click here

Exliquer sa démarche – see the page that is designed specifically for this.

For help with mp3 files, you need to visit the pages called Speaking work mp3 files.

On-line DICTIONARY : www.wordreference.com

Or : dictionary.cambridge.org

References : kids.britannica.com